20617578

素因数分解:

$2^1\times 3^6\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:278

約数の個数: 56

約数和(自身を含む): 47217600

約数和(自身を除く): 26600022

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 79, 81, 158, 162, 179, 237, 243, 358, 474, 486, 537, 711, 729, 1074, 1422, 1458, 1611, 2133, 3222, 4266, 4833, 6399, 9666, 12798, 14141, 14499, 19197, 28282, 28998, 38394, 42423, 43497, 57591, 84846, 86994, 115182, 127269, 130491, 254538, 260982, 381807, 763614, 1145421, 2290842, 3436263, 6872526, 10308789, 20617578]

約数ペア:

[(1, 20617578), (2, 10308789), (3, 6872526), (6, 3436263), (9, 2290842), (18, 1145421), (27, 763614), (54, 381807), (79, 260982), (81, 254538), (158, 130491), (162, 127269), (179, 115182), (237, 86994), (243, 84846), (358, 57591), (474, 43497), (486, 42423), (537, 38394), (711, 28998), (729, 28282), (1074, 19197), (1422, 14499), (1458, 14141), (1611, 12798), (2133, 9666), (3222, 6399), (4266, 4833)]